Food can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.Here are some examples of food-to-food cross-contamination: 1  In a refrigerator, meat drippings from raw meat stored on a top shelf might drip onto cooked vegetables placed on lower shelf.ood can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.
Best Answer: Putting batteries in the freezer or refrigerator doesn't necessarily prolong their life. Alkaline batteries stored at room temperature self discharge at a rate of less than two percent per year. So normally refrigerating or freezing them will only help maintain their charge by a tiny amount.
Reviving a NiMH or NiCD Battery in the Freezer. 1  1. Determine if you have the right type of battery for this method. 2  2. Remove your NiMH or NiCD battery. 3  3. Place the battery in a sealed plastic bag.  4. Put the bagged battery in the freezer for about 12 1  hours. 5. Remove the bag from the freezer.  6. Put the battery back into the laptop.